Telephone system



Feb. 16, 1932. l K, BALLHQRN 1,845,215

TELEPHONE SYSTEM Filed Sept. 9. 1929 Patented Feb. 16, 1932 UNITED STATES PATENT OFFICE KURT BALLHORN, kOF BERLIN, GERMANY, ASSIGNOR TO SIEMENS & HALSKE .AKTIEN- GESELLSCHAFT, WERNERWEBK, OF SIEMENSSTADT, NEAR BERLIN, GERMANY f TELEPHONE SYSTEM Application. mea september 9,1929, seria1'1v0.391',299, and n1 Germany october ,'25, 1928.

The invention relates to the positioning of non-decimal switches in communication sysf tems; it consists in that the impulse senders have decimal positioning members andare provided with v devices, which send out in one impulse train a number of impulses equal to the number of thewanted connection. 'l

VOne method of carrying out the invention is shown by way of example in the drawing. The invention is not limited to this example. Only those circuit detailsare shown that are required to'understand the invention.`

The drawing shows at Zg a number senderk and at W a diagrammaticallyshown switch; whose stepping` means--not shown in the drawing-is operated by the impulses transmitted from the number sender. The number senderZg comprises` a -point` rotary switch similar to thegrotary lineswitch well known in automatic telephony andconsisting of a rotary operating magnet D1 and three contact banks wiped over by the wipers a, o, and c. This number sender is controlledby ordinary strips of 10 keys each. Of the' units strip only the keys E 1, E 2 and E 0v areshown diagrammatically and of the tens key strip only thekeys Z 0, Z 1, and Z 2 are shown. On pressing any units key, a starting key E is actuated at they same time. y

VThe lines coming from the key strips are connected in the following manner to the conf tact banks of the number sender. In thesegment wiped over by the switchwiper'o the contacts 1-9, 1019, etc., are interconnected. The lines coming from the tens`V keys go to these individual contact groups; thus, for

example, the line over which battery is ap`` plied by the key Z 0 goes to the contact group 1 9; Z 1v to contacts group` 10;19, etc. At the segment,which is wiped overpby-the wiper a, the key E 1 applies earth to the Vcontacts 1, 11, 21,v etc. Similarly, the other keys apply earth to their corresponding contacts. The method of operating thenumber sender is as follows: By pressing the key A the operator can ascertain whether the numberA senderr is in the normal position so that it canbe used. The free lamp F L is then lighted inthe following circuit:` earth, battery, lamp FL,

Wipers a and o of the number sender in position O, key A, earth. If a units and ltens key be now pressed, the starting key E is operated at the same time as before described. v The Y i latter closes the following circuit forjthe relays R'and An: earth, battery, winding of re-V lays An' and R, wiper 0 in position O, key E, earth. Relay An at its contact 10cm) prepares the sending circuit going to the switch W. f

RelayR is yoperated and closes its contacts 2 T andir. Over contact 2 1', the relay X is en; ergized as follows :,earth', battery, resistance, winding of relay X, contact 2 1', earth.' Relay X closes its contacts 3 and 4.- Vand opens contact 5 Y While relayXlOCks itself over contact 3 the contact 4 closes the following circuit for the rotary magnet D 1,: earth, battery, winding of the rotarymagnet D1, contact 4m, earth,` The contact 5 will be .mentionedlater in-conjunction with the cirwhich deenergizes and advances the wipers to ythe next set of bank contacts and at contact 12d'1 removes the short. circuit from relayR, which can vthen be operated again. An impulse issent to the switch W eachtime the relay R operates. When the wipers a and bof the number sender simultaneously wipe over a Contact earthed over `the unitskey and one of the tens group, to lwhich battery has been applied over a tens key, the relay P is operated inthe following circuit: earth, battery, winding of relay P, contact 5 zu," pressed tens key, wiper Z7, wiper a, pressed units key, earth. This circuit is not closed until contact 5 'a' has been closed, that is to say, until relay X has fallenback, so that now the'last of the required impulses has been -sent over the line to switch W. Relay `P closes its contact 15 p to lock itself inthe following circuit: earth, battery, winding of relay P, contact 15 p, wiper c, earthed contact bank of wiper o. Re` layfl? kat contact 16 p also opens the lead to switch W, thereby stopping the impulse transmission. RelayP locks itself untilthe number sender is again in its normal position.

simultaneously engage marked. bank contacts for stopping the transmission of impulses.`

2. In a register sender, a rotary switch- Vhaving two wipers each arranged to wipe over a seto'f bank contacts, means for marking certain of the bank contacts of each set, animpulsing circuit momentarily closed at each stepfof said. switch,.and means effective whensaid Wipers simultaneously engage marked. bank. contacts for opening said impulsing circuit. andy maintainingsaid circuit open until saidv switch has returnedjto normal. y

3. In a register sender, a rotary switch having a plurality. of wipers each arranged to wipe over a` set of bank contacts, a group-of keys associated with each set of banks for marking said contacts in accordance withY the number ofl impulses to be. transmitted, means responsive'tothe.operation of said switch for transmitting a series of impulses whose length.v is. limited. only ybyy the number of. contactsin each of 'saidI banks, and 'means controlled over tw'o. of said wipers inlseries for stopping the transmission of impulses fat any predetermined. pointv as indicated by. the marking of' the bank contacts.V

` 4. In an operators sender, a set'of units keys land a set of tens vkeys,.a-counting switch having a units wiper anda tensl wiper. each arrangedto wipe over aV set ofbankcontacts connected to said units and tens keys,.respectively,l and a'testingy circuit including said wipers in series' and effective when said wipers simultaneously engage bank contacts associated with depressed units and tens keys.-

5. Ina register sender, ar group of; units keys and a group of tens keys for setting up the number o'tiinpulses to be transmitted in asingle series, a counting switchA having a units wiper and a tenspwiper whose banks are connected. to saidunits keys and said tens keys, respectively,.a.test relay for. stopping the transmission of impulses, and aV circuit for said relay closed when said wipers simultaneous-ly engage bank contacts associated withdepressed units and tens keys.

6.y InV a register sender, tensl andunits registers, an impulse sender, andV a counting switch controlled by both registers while said impulselsender is-tran`smitting asingle series otimpulses.

7. Ina register sender, two registers, a counting switch controlled by both of said registers, means controlled by said counting the length of said series.

8. In combination, a counting switch havying aV plurality of wipers and a set of bank contacts associated with each wiper, registering means for temporarily marking cert'ainbank contacts in each set, means -or operatingVK said counting switch, and means responsiveto the operation of said switch for Y transmittinga single series of impulses whose Vlength is governed by the marking on said bank contacts. I

9.y In a register sender, means for registering the two digits of a two digit number, an impulse sender, and means controlled by said registering means for causing said impulse sender to transmit a series of impulses equal in number to the numerical value'ofthe two digit number. Y l

10. In combination, registering apparatus, a plurality of controlconductors extending from said apparatus to a testing device, a sending device associated Vwith said testing device, .means for operating said sending device, and 4means' for operatingv said testing device to progressively .test said conductors in pairs .during the operation of said sending device.

11., In combination, a. sending device in; cluding a rotary switch, a plurality of control conductors terminatingl 1n the ,banks of .2.

saidV switch, a plurality of keys for placing marking potentials on. said conductors, and meansY for progressively operating said switch to test saidgconductorsxin pairs'itor said marking potentials; A

V12. In a register sender., a register comprising a pluralityjof registering devices having-.a pair of contacts each, each vdevice being operable to close its contact pair, means for operating said devices in any one of more combinations or orders than there are devices, and an Vimpulsesender operable to'send a series of impulses and to test said contact pairs in said combinations-as the impulses are being transmitted, there being a different number ofimpulses assigned to each combination. l

18. In a register sender, a register comprising a. plurality of registering devices having a pair of contacts each, each device being operable to close itscontact pair, means for operating said devices in any one of more combinations or order than there are devices, an impulse sender operable to send a series of impulses and to test said contact pairs in said combinations as the impulses are being transmitted, there being a dierent number of impulses assigned to each combination, andmeans for terminating the impulse transmission whenthe test made indicates that the impulses transmitted correspond in number to the combination registered.

14. In a register sender, a register comprising separately-operable registering devices, means for separately operating said registering devices in any one of more combinations or orders than there are devices, a sender, means for operating said sender to transmit a series of impulses, and means including separate connections to said sender from said registering devices, for controlling the number of impulses in the series in accordance with the instant combination or order set up on saidregister so that the number of impulses contained in said series distinguishes any registered one of said combinations or orders from any other one of said combinations or orders.-

In Witness whereof, I hereunto subscribe my name this 15th day of August, A. D. 1929. KURT BALLHORN. l

respectively, 

